archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 06:45:07 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8189871: Refactor GC barriers to use declarative semantics

Browse source 
Reviewed-by: pliden, rkennke, coleenp, dholmes, kbarrett, stefank
This commit is contained in:
Erik Österlund 2017-11-20 13:07:44 +01:00
parent 63122ba705
commit 3e5e2f03b1
45 changed files with 3458 additions and 806 deletions
Download patch file Download diff file Expand all files Collapse all files

111
src/hotspot/share/gc/shared/modRefBarrierSet.inline.hpp Normal file
View file

@ -0,0 +1,111 @@
/*
* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef SHARE_VM_GC_SHARED_MODREFBARRIERSET_INLINE_HPP
#define SHARE_VM_GC_SHARED_MODREFBARRIERSET_INLINE_HPP
#include "gc/shared/modRefBarrierSet.hpp"
#include "oops/klass.inline.hpp"
#include "oops/objArrayOop.hpp"
#include "oops/oop.hpp"
template <DecoratorSet decorators, typename BarrierSetT>
template <typename T>
inline void ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT>::
oop_store_in_heap(T* addr, oop value) {
BarrierSetT *bs = barrier_set_cast<BarrierSetT>(barrier_set());
bs->template write_ref_field_pre<decorators>(addr);
Raw::oop_store(addr, value);
bs->template write_ref_field_post<decorators>(addr, value);
}
template <DecoratorSet decorators, typename BarrierSetT>
template <typename T>
inline oop ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT>::
oop_atomic_cmpxchg_in_heap(oop new_value, T* addr, oop compare_value) {
BarrierSetT *bs = barrier_set_cast<BarrierSetT>(barrier_set());
bs->template write_ref_field_pre<decorators>(addr);
oop result = Raw::oop_atomic_cmpxchg(new_value, addr, compare_value);
if (result == compare_value) {
bs->template write_ref_field_post<decorators>(addr, new_value);
}
return result;
}
template <DecoratorSet decorators, typename BarrierSetT>
template <typename T>
inline oop ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT>::
oop_atomic_xchg_in_heap(oop new_value, T* addr) {
BarrierSetT *bs = barrier_set_cast<BarrierSetT>(barrier_set());
bs->template write_ref_field_pre<decorators>(addr);
oop result = Raw::oop_atomic_xchg(new_value, addr);
bs->template write_ref_field_post<decorators>(addr, new_value);
return result;
}
template <DecoratorSet decorators, typename BarrierSetT>
template <typename T>
inline bool ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT>::
oop_arraycopy_in_heap(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
BarrierSetT *bs = barrier_set_cast<BarrierSetT>(barrier_set());
if (!HasDecorator<decorators, ARRAYCOPY_CHECKCAST>::value) {
// Optimized covariant case
bs->write_ref_array_pre(dst, (int)length,
HasDecorator<decorators, ARRAYCOPY_DEST_NOT_INITIALIZED>::value);
Raw::oop_arraycopy(src_obj, dst_obj, src, dst, length);
bs->write_ref_array((HeapWord*)dst, length);
} else {
Klass* bound = objArrayOop(dst_obj)->element_klass();
T* from = src;
T* end = from + length;
for (T* p = dst; from < end; from++, p++) {
T element = *from;
if (bound->is_instanceof_or_null(element)) {
bs->template write_ref_field_pre<decorators>(p);
*p = element;
} else {
// We must do a barrier to cover the partial copy.
const size_t pd = pointer_delta(p, dst, (size_t)heapOopSize);
// pointer delta is scaled to number of elements (length field in
// objArrayOop) which we assume is 32 bit.
assert(pd == (size_t)(int)pd, "length field overflow");
bs->write_ref_array((HeapWord*)dst, pd);
return false;
}
}
bs->write_ref_array((HeapWord*)dst, length);
}
return true;
}
template <DecoratorSet decorators, typename BarrierSetT>
inline void ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT>::
clone_in_heap(oop src, oop dst, size_t size) {
Raw::clone(src, dst, size);
BarrierSetT *bs = barrier_set_cast<BarrierSetT>(barrier_set());
bs->write_region(MemRegion((HeapWord*)(void*)dst, size));
}
#endif // SHARE_VM_GC_SHARED_MODREFBARRIERSET_INLINE_HPP